Related Experiment Video
Updated: Aug 22, 2026

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
Published on: April 5, 2011
[Comparative study of antiarrhythmic properties of quinicine versus quinidine (author's transl)]
Abstract:
Quinicine, an isomer of quinidine is used for its cerebral vasodilating activity. This study was performed in order to find out if quinicine also behaves like an antiarrhythmic agent in animals. The preventive and curative actions of quinicine on the experimental ouabain induced arrhythmia have been demonstrated. The mechanism of action of this drug seems to be the same as quinidine, i.e. prolongation of refractory period, diminution of atrial and atrioventricular conduction velocities, anticholinergic and local anaesthesic properties. The quinuclidic ring is therefore not a major factor to assure the antiarrhythmic activity of quinquina alkaloids.
Related Concept Videos
Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers
Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers
Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
Dysrhythmias VI: Management of Dysrhythmias

